This trio of reliefs—an ear, a mouth, and a pair of eyes—carved into the walls of flooded quarries is a monument to spying.

A Jenga-style cylindrical tower of books that appears to go on forever.

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

The largest and best-preserved rotunda in Prague.

A quasi-futuristic roof sits atop a medieval Bohemian monastery damaged during World War II.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

This unusual statue overlooking the Royal Mile has an interesting backstory.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A stone monument acknowledging Scotland's right to have a separate Parliament from the one in Westminster.

A miniature of a lighthouse acts as a beacon for what transpires inside this location.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

This sculpture commemorates Edinburgh's sister city and their respective celebrity dogs.

The most loyal of little dogs, or a Victorian era publicity stunt?

Glasgow's own "tipsy" temperance monument.

Vibrant paintings stretch across 600 feet of derelict railway.

A unique art installation located on what was once considered the widest railway bridge in the world.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A small collection of objects of a bygone era hide in plain view.